Monday Nov 24, 2008 (foodconsumer.org) -- A study
published in the Nov 2008 issue of Cancer Causes and Control suggests that
engaging in exercise or physical activity of any intensity reduces the risk of
colon and rectal cancer while being physically inactive increases the risk.
The study involved 488,720 men and women participating in
the NIH-AARP Diet and Health Study who were aged 50-71 years at baseline in
1995-1996. Through Dec 31, 2003, 3,240 and 1,482 colorectal cancers among men
and women were recorded, respectively.
The study led by Howard R. A. and colleagues from the
National Cancer Institute found men engaging in exercise five or more times per
week compared to those who were never or rarely exercising were at a 21 percent
reduced risk of colon cancer.
the reduction was 15 percent.
In men, exercise also decreased the risk of rectal cancer
by 24 percent.
In men, higher intensity of exercise led to higher reduction
in the risk of colon cancer.
intensity of physical activity (more than or equal to 7 hours per week) was
associated with a 19 percent reduction in the cancer risk while moderate to
vigorous intensity of physical activity (more than or equal to 7 hours per
week) reduced the risk by 18 percent.
In both men and women, physical inactivity or exercise
defined as spending more than 9 hours per day (according to the report although
it sounds like high) on watching television or videos was associated with a 61
percent increased risk of colon cancer.
Another study said lack of sleep could increase risk of cancer.
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